Apply original option classes to Chosen's search choice.

[rocket-turtle]

Hello,

thank you for this awesome JS library.
You added the feature that the classes from the original select options get pulled down to the chosen-results.

In my case it would be good to have them on the chosen-choices as well.
Here is a fiddle

I think it can be done by adding item.classes to the class: "search-choice" in Line

Problem would also be solved if this get merged #2574.